Case Atlas / Historical data
Outcomes & workload.
Follow decisions, demand, and pending cases across USCIS offices. Explore the longer history of who becomes a U.S. citizen.
51 forms / 2014-2026
Quarterly and monthly reports
Collected 2026-10-02
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Geography / 50 states
Two ways to read the map.
Approval share of decisions by office location
Selected period. Counts combine reported offices within each state. Rates use summed approvals and denials. Office location is not applicant residence or office jurisdiction.
Blank tiles have no comparable reported data. Select a state to inspect its history.
Office locations use a provisional historical/current crosswalk. 0 office rows without a 50-state mapping are omitted. Missing counts make affected state metrics unavailable.
The long view / 1907-2024
A century of naturalization.
National annual counts from OHSS. Persons naturalized count people who became citizens; they are distinct from N-400 approvals.
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Read before comparing
Sources, coverage, and definitions.
A decision share, not a filing-cohort rate.
Approval share is approvals divided by approvals plus denials. Cases decided during a period may have been filed earlier. Suppressed and unavailable cells stay unknown, including when aggregating states. Pending is an end-period inventory and is never summed across time.
Keep series separate.
Quarterly all-form reports, quarterly office reports, and monthly national reports can disagree. This page keeps them separate. Combined categories already include their category rows. Annual persons naturalized measure a different event.
Definitions and geography change.
Older USCIS denial fields include terminated or withdrawn applications. FY2023 notes describe denied applications only; the precise transition remains unaudited. International-office coverage and office boundaries also change. A historical rate change can reflect these differences.
Source audit remains partial.
1,044 cells checked against one FY2014 Q1 N-400 original, with 0 mismatches. Other quarters and forms remain derived transcriptions. Linked original reports are the primary sources for checking values.